Traveling to Turkey this summer!?

US citizens buy a visa at the airport before going thru pport control. Less than $50 as I remember -- could depend on your length of stay. Don't know about your Lebanese friend's visa requirements. As far as money, figure what you plan to do, estimate what it would cost in the US, and take that amount. You should come out with money left over (not a bad idea). When estimating, figure in EVERYTHING (not easy to do if you don't travel much -- little things add up!).